问防止动画按钮改变颜色on_press或on_release (没有kv / Python部分)

EN

from kivy.animation import Animation
from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.behaviors import ButtonBehavior

global active
active = True
class TestApp(App):
    def plop_slide_animation(self, instance):
        global active
        if active == True:
            plop_slide = Animation(pos=(250, 350), duration=0.5)
            active = False
        elif active == False:
            plop_slide = Animation(pos=(250, 200), duration=0.5)
            active = True
        plop_slide.start(instance)
    def ploppi_press(self,instance):
        print('ploppi')
    def plopper_press(self,instance):
        print('plopper')

    def build(self):
        button1 = Button(background_color = (1,.6,1,1), size_hint=(.2, .2), pos=(250, 200), text='PLOP', on_press=self.plop_slide_animation)
        button3 = Button(background_color = (128,0,0,.5), size_hint=(.09, .09), pos=(260, 250), text='ploppi', on_press=self.ploppi_press) #background_color = (128,0,0,.5), 
        button4 = Button(background_color = (0,0,255,.5), size_hint=(.09, .09), pos=(450, 250), text='plopper', on_press=self.plopper_press) #background_color = (0,0,255,.5),
        layout = FloatLayout()

        def change_text(button):
            global active
            if button1.state == 'down':
                print(button1.state)
            if active == True:
                button1.text = 'PLOOOOP'
                print('PLOOOOP')
            if active == False:
                button1.text = 'PLOP'
                print('PLOP')

        button1.bind(on_press=change_text)

        layout.add_widget(button3)
        layout.add_widget(button4)
        layout.add_widget(button1)


        return layout

if __name__ == '__main__':
    TestApp().run()```